Smoke pipe



FIG. 1 is a right side perspective view of a smoke pipe showing my new design;

FIG. 2 is a left side perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a front perspective view thereof. 

The ornamental design for a smoke pipe, as shown. 